交通荷载下沥青加铺层路面力学分析

摘要

利用线弹性力学原理,建立沥青加铺层路面结构三维模型,采用有限元分析沥青加铺层厚度和弹性模量、旧路弹性模量、水平力及轴载等参数变化对沥青加铺层力学状况的影响,并研究裂缝和层间接触对加铺层性能的影响.研究结果表明:加铺路面结构参数和荷载特性对加铺层受力状况都有较大的影响,加铺层厚度及旧路裂缝对加铺层受力特性影响显著,层间接触情况对加铺层寿命影响较大.研究结果对沥青路面的加铺设计、施工具有重要参考价值.%Damage induced by traffic loads is one of the conventional damages in asphalt concrete overlay and the old asphalt pavements. Based on linear elasticity theory, the three-dimension model was established, and the influence of parameters like overlay thickness, modulus, axes loading and horizontal load were studied. Cracking length, width and the effect of bond condition on overlay performance were emphatically analyzed. The results indicate that the structure and load characteristics of the overlay have influence on stress, which has certain regularity. More attention should be paid to those factors during the overlay design and construction.